A new solar cell just smashed a key efficiency barrier. It's a tandem design, stacking perovskite on top of silicon. The result? Over 26% efficiency. That's a record. For years, 26% was a hard ceiling. Now it's broken. These cells capture more sunlight. The perovskite layer grabs high-energy light. The silicon layer handles the rest. Together, they waste less energy. Researchers are already talking about commercial production. The next step? Making them cheap and durable enough to last decades on your roof.